Rebirth of science and technology academic master

Chapter 300 Prototype Manufacturing

XAC Group.

As my country's R\u0026D and production base for large and medium-sized military aircraft, XAC covers an area of ​​more than 3 million square meters, or more than 5,000 acres, and has more than 20,000 employees. For nearly 60 years since its establishment in 1958, XAC has developed and produced more than 20 types of military and civilian aircraft. Military aircraft mainly include "Flying Leopard", H-6 series aircraft, etc., as well as the Y-20 strategic transport aircraft that has not yet been officially put into service; civilian aircraft mainly include Y-7 series aircraft and MA-60 aircraft.

Although XAC's market value is only over 100 billion, there is no doubt that it is an aircraft manufacturing company with many advanced technologies. As the leading unit for the development, improvement and modification of new aircraft of XAC Group, the Design Department of XAC Technical Center has nearly 500 aircraft professionals, including 21 researcher-level senior engineers, more than 140 senior engineers, and 150 engineers. It has seven professional aircraft design research laboratories, including overall aerodynamics, fatigue strength, structural dynamic systems, mechanical systems, and ad hoc systems. As well as a system principle laboratory, two business management rooms and a full range of 49 professional groups.

Of course, in comparison, the Aeroengine Research Institute of Shuimu University is even larger and has 1,200 researchers, including more than 500 professors and first-level researchers, more than 500 associate professors and second-level researchers, and the rest are Those who are still studying for a Ph.D., graduate school, or have just become researchers will have stronger technical capabilities.

However, after all, XAC is an aircraft manufacturing base with a stronger foundation. It has more than 6,000 pieces of equipment, including more than 1,600 metal cutting equipment, more than 70 large-scale precision processing equipment and more than 30 new technology production lines, all of which have the international advanced technology of the 1990s. advanced level. Moreover, XAC has 20 professional supporting aircraft design rooms and five series of aircraft design laboratories including flight control, hydraulics, fuel oil power, power supply, and environmental control; its subordinate equipment, power, technical equipment, mechanical processing, It has nine professional aircraft production plants including sheet metal, non-metal, partial assembly, final assembly, and flight test; it has established various professional institutions such as materials technology application research institute, computer center, testing center, and measurement and inspection center.

Now XAC is working hard to build a prototype. They are even more enthusiastic about the Y-30 than the Y-20 developed by themselves. They can't wait to divide it into two steps. One is to conduct supercomputer simulations and wind tunnel tests, and the other is to start manufacturing the prototype.

XAC is grateful to its superiors for handing over the manufacturing prototype to XAC. They know that once the prototype passes a series of experiments and is finalized, mass production will be handed over to XAC. This will undoubtedly allow XAC to improve its strength by a big step. After all, Y-30 involves a whole set of new materials, whether it is titanium alloy, nickel alloy or new composite materials, these are the most advanced technologies. XAC can also take advantage of this situation to control and use it in its own products. .

They hope to seize the opportunity. The market value is only more than 100 billion, which is obviously not in line with the actual market value of XAC. They want to learn from the aviation engine power. The market value of aircraft engine power has risen sharply because of the Everest engine and the Gefeng engine. Now the market value is It has exceeded 500 billion, an increase of more than ten times.

And you must know that XAC’s technical strength is still higher than aviation engine power!

The engine manufacturing base and the operation rooms are all busy. Various parts are being transported, making it seem like a large mechanical processing factory. People are coming and going, showing an active scene.

They will complete the production and manufacturing of 8 "Qinling engines" in three months for mounting on the Y-30.

This is undoubtedly a challenging task, but although it is a listed company, it is actually a national first-level enterprise, so it is natural to complete the task.

"Mr. He, we must pay close attention to the Y-30 prototype manufacturing. The Shuimu University Aero Engine Research Institute has transferred a 1 billion advance payment to the group's account. Our XAC Group must also strive for success and cannot lose face. Otherwise, we will lose face in the industry. It will make a big joke inside, and if the superior leaders take down the blame, our XAC will miss the development opportunity!" Zhao Dong, chairman of XAC Group, said seriously.

"Don't worry, Director Zhao, we have put 100% enthusiasm and attention into the Y-30, and there will definitely be no mistakes!" said Mr. He.

As the chief engineer of XAC Group, Mr. He served as the designer and deputy team leader of the design department in 1988. In 1995, he served as the assistant director of the design research office. In 1998, he served as the director of the ad hoc system design research office of the design department. In 2004, he served as deputy director of the technology center and director of the design department. In 2006, he directly served as director of the technology center of XAC Group. In 2008, he served as chief engineer of XAC Group. Director and Vice President of Aircraft Group, Mr. He knows very well what this Y-30 prototype manufacturing means.

This means that it is a huge opportunity for XAC, not only the huge order of Y-30, but also the further improvement of Y-20, the improvement and modification of related aircraft and the development of new aircraft.

A D-30 engine costs US$3 million. The Qinling engine, which is more advanced than the D-30, can be sold for US$4 million or even US$5 million.

Things like engines are a seller's market. Whether you want to sell them or not is a matter of two opinions.

Therefore, Mr. He has been focusing on the manufacturing of Qinling engines and the production of related materials. In order to produce some specific materials, XAC has even applied to his superiors for a batch of the latest equipment, some of which even XAC does not have.

Such as giant hydraulic machine tools and ultra-high pressure hydraulic equipment.

Many components require an 80,000-ton die forging hydraulic press, and there is only one 80,000-ton die forging hydraulic press in China. It is produced by the Huaxia Second Heavy Machinery Group in Deyang, Sichuan. This one is also the world's largest die forging press. The hydraulic press was just put into production on November 2, 2012. This die forging hydraulic press is 27 meters above ground, 15 meters underground, with a total height of 42 meters, and a total equipment weight of 22,000 tons. It is precisely because of such a national treasure-level strategic equipment that the Y-30 will be optimized to the greatest extent and use so much titanium alloy!

In addition, a 15,000-ton hydraulic press is also needed, which is also an important equipment of the country. It needs to be processed and produced at the first level, otherwise Xifei has nothing to do.

In recent years, with China's breakthroughs in some heavy equipment, its processing capabilities have improved by leaps and bounds. China can manufacture third-generation aircraft, fourth-generation aircraft, large passenger aircraft, and transport aircraft. Without large-scale die forging hydraulic presses and hydraulic presses, many aircraft parts would not be forged at all.

At that time, China's self-developed large passenger aircraft 'Y-10' made its first test flight. After accumulating 170 hours of test flight, it stayed on the ground. This was because China did not have a large-scale die forging hydraulic press at that time and could not forge the aircraft girder as a whole. Instead, it used small equipment to forge it in sections. , combined and assembled, unable to meet the performance indicators required by large aircraft.

It is precisely because of the importance of large-scale die forging hydraulic presses that it has become an important symbol of measuring a country's industrial strength.

"Mr. He, you must remember that this is the most important task of our XAC aircraft at present. It must be completed on time no matter what. We must see two Y-30 prototypes completed according to the design on October 30. Otherwise, we Fei is about to die!" Director Zhao patted Mr. He on the shoulder.

Mr. He felt that the burden on his shoulders was getting heavier.

However, seeing the researchers from the Aero Engine Research Institute working tirelessly to advance the mission with the manufacturing engineers, Mr. He knew that he had no way out, and Xifei had no way out either!

Qin Yuanqing also follows up on the manufacturing progress of the Y-30 prototype at any time. After all, no one knows what problems may occur during the forging process. Some design indicators have been proposed, but they must be manufactured.

More than one-third of the researchers in the entire institute were sent to XAC, and cooperative units such as Harbin Institute of Technology and Beihang University also sent people to XAC to participate in the production of prototypes.

Qin Yuanqing was very sure and confident about the design of the Y-30, but Qin Yuanqing was still not at ease about Xifei.

In order to put pressure on XAC, Qin Yuanqing accompanied his superiors to XAC every now and then to check the manufacturing progress of the prototype and the forging of components.

The manufacturing costs of these two prototypes were paid by the Aero Engine Research Institute. The advance payment was as much as 1 billion yuan, and there was still 200 million yuan in payment later.

Once something goes wrong, the losses will be huge.

Fortunately, the higher-level departments also attach great importance to the Y-30, and even send military representatives to keep an eye on the Y-30. They are also very strict about quality and progress.

Qin Yuanqing also went to watch the wind tunnel test. Wind tunnel test refers to placing a model of an aircraft or other object in a wind tunnel to study the gas flow and the interaction of other models to understand the aerodynamic characteristics of the actual aircraft or other object. Aerodynamic Experimental Methods.

Although the original C-17 Globemaster has complete wind tunnel test data, after all, there are many areas for optimization, and wind tunnel tests still need to be done from scratch to simulate some of the aircraft's data.

Fortunately, the wind tunnel tests so far have been normal and nothing abnormal has occurred.

Of course, the wind tunnel test is just a simulation test and cannot be completely accurate. For example, there are deficiencies in boundary effects or boundary interference. In real flight, the stationary atmosphere has no boundaries, but in wind tunnels, the airflow has boundaries, and the existence of boundaries limits the boundaries. In addition, there is bracket interference. In wind tunnel experiments, brackets are needed to support the model in the airflow. The existence of the bracket causes interference to the model flow field, which is often referred to as bracket interference. Although the influence of the bracket can be corrected through experimental methods, it is difficult to correct it completely.

In addition to wind tunnel testing, the Y-30 is also undergoing supercomputer simulation and operation, but so far everything is going smoothly.

As the end of June came, Qin Yuanqing had to return to school because he had to say goodbye to a group of graduates. The end of June was the graduation season for undergraduates, graduate students, and doctoral students. As the executive vice president of Shuimu University, he had to attend the graduation ceremony. , send these graduates on their last journey.

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